Improvements in Drilling Tools
Номер патента: GB190402010A
Опубликовано: 03-03-1904
Автор(ы): Bengt Magnus Wilhelm Hanson
Принадлежит: Individual
Опубликовано: 03-03-1904
Автор(ы): Bengt Magnus Wilhelm Hanson
Принадлежит: Individual
Реферат: 2010. Hanson, B. M. W. Jan. 26. Drills.-Twist drills and the like are shaped to facilitate the escape of the cuttings, while retaining a greater section than usual. Grooves 8, Fig. 4, are cut in the tool-body adjacent to the main grooves 6, but separated therefrom by helical ribs 12, and having a quicker pitch so that they merge into the tool-body at the cutting-edge and gradually increase in width towards the shank.
Method and plant for air quality improvement in restricted space
Номер патента: RU2338961C2. Автор: Лауфей ЛИН. Владелец: Лауфей ЛИН. Дата публикации: 2008-11-20.